Furnace or oven



Jan. 5 1926. I 1,568,317

H. B. CANNON FURNACE OR OVEN Filed May 14, 1924 Patented Jan. 5, 1926.

UNITED STATES 1,563,311 .PATENT oFFicE.

man; n. CANNON, o r nETUcnEN, New JERSEY.

FUBNACE OR OVEN.

application med may 14, 1924. serial Nafnaiss.

full, clear, and exact description, referencev being had to the accompanying drawingsx y vention s This invention relates to furnaces or ovens, and more particularly to furnaces of the general type exemplified in my Patent No. 1,371,774, issued March 21, 1921.

It is the general purpose and object of the invention to provide a furnace wherein articles or objects are efficiently heated by radiant heat from a combustion chamber of high heat-radiating qualities as well as by sensible heat from the products of combustion and by radiant vheat from the Hoor of' the furnace. Further and 'more limited objects of the invention will appear hereinafter in the detailed description of the inventionwhich follows.

In the drawings, .which illustrate my invention in one vembodiment thereof, Fig.' 1 represents a central longitudinal vertical sectional view through a furnace or oven constructed in accordance with such inven. tion; Fig. 2 a 'transverse sectional view of the furnace or oven sliown in Fig. 1, the view corresponding to the line 2-2 of Fig. 1; and Fig. 3 a detail in section correspondin to the line 3-3 of Fig. 2. v

nthe articular embodiment of my inlliown herein, there is illustrated onl the construction of the furnace or oven an the coo erating construction and arrangement o? the combustion chamber, the s ace within the furnace or oven and above tiie combustion chamber and the iloor thereof being unoccupied, such space being adapted for the reception ofany articles or objects desired to be subjected to the action of the furnace or oven.

Describing the various parts by reference characters, 1 denotes the foundation of the furnace or oven, 2 the front wall, 3 the rear wall, 4 the side walls, and`5\the top wall or roof, the last mentioned wall being provided with an outlet 6 and a flue 7 leading to a stack (not shown). The parts 1-5 inelusive will be made of any approved refractory material of suitable heat-resistant qualities. The base or foundation 1 is of sufficient depth to have formed therewithin and below the floor 8 of the heating chamber 9 a suitable number of longitudinally extending iiues, two of such ilues being indicated at 10 and located one on each side of the central portion of the foundation. These llues extend nearly the full length of the furnace or oven, from front to ,rear thereof, and the iioor above such lues is provided with a suitable number of openings 11 for the discharge of products of combustion into the chamber 9. The front ends of the flues 10 are connected by a transverse flue l2, also located below theloor.

Su ported upon the central portion of the oor, between the iues l0, is a combustion chamber, the said chamber being made of material having high heat-radiating qualities, such as silicon carbide, and comprising generally a bottom wall 13, side walls 14, a top .wall or cover l5, a rear wall 16, and a artitionvl; extendin lfrom the front of t e chamber rearwar y toward but spaced from therear wall 16, thereby kto provide an upper passage A, a lower passage B, and an end passage C within the said chamber. The combustion chamber,

being formed of silicon carbide will be made of slabs of this material, the joints between adjacent slabs being closed by cement, preferably of silicon carbide. The rear wall`16 abuts against and is supported by a stabilizing pier 18 at the rear of the furnace or oven, while the upper passage A is ex-l tended in the formV of a neck 19 into an opening 20 formed in the front of the furnace or oven. At itsfront end, the passage B discharges into the front transverse flue 12 through an .butlet B.

The combustion chamber shown and described herein may be heated in any approved manner, an oil burner of any approved and standard construction for this.

purpose being indicated conventionally at 21. With the parts constructed and arran ed as described, the operation will be as ollows: A combustible mixture being sup lied to and burningwithin the combustion c am ber will, under proper manipulation of the regulation of fuel and air, the combustion chamber will be heated in the most efficient manner and, because of its construction and of the material of which it is composed, will deliver heat by radiation in a most effective manner to the chamber 9. The division of the combustion chamber into the upper and lower passages 'A and B communicating by the passage C beyond the end of the partition 17 provides in effect a long combustion chamber, wherein the combustion in the upper passage A is facilitated by the heat radiated thereinto from the lower passage B through the partition 17. The products of combustion. delivered from the outlet B' into the flue 12 will be distributed thereby into-the flucs 10, the arrangement of the openings 11 being such as to ensure practically uniform distribution of these products into the chamber 9 thereabove.

Because of the construction and arrangement of the parts shown herein, articles within the chamber 9 will be heated-in a very efficient manner, not only by radiant heat from the combustion chamber and from the floor 8 above the flues 10, but also by the sensible heat contained in the products of combustion delivered through the apertures 11.

Various uses of my furnace oroven will suggest themselves to those skilled in the art. For instance, it is particularly well adapted for use Yas a core oven; for the heating and distribution of fluid in coils or stills; and for the heat treatment of metal; and I do not propose to limit the use of my furnace or oven to the heating of any particular object or material.

Having thus described my invention, what I claim is 1. A furnace or oven comprising in combination walls forming a heating chamber, the bottom wall constituting a floor for said chamber and being v,provided with a flue beneath said floor, a combustion chamber within the heating chamber and arranged to heat the same by radiation, means for heating the said combustion chamber interiorly, and means for discharging the products of combustion from the combustion chamber into said flue, the said flue being provided with one or more openings for delivering the products of combustion into the heating chamber whereby the said chamber is heated by radiant heat from the combustion chamber and from the floor and by the sensible heat of the gases delivered through the opening or openings in said flue.

2. A furnace or oven comprising in combination Walls enclosing a heating chamber, the bottom wall constituting a floor for said chamber and being provided with flues therebeneath, a combustion chamber within thereof, a combustion chamber Within thev heating chamber arranged to heat such chamber by radiation, and means for heating the said combustion chamber interiorly, the said combustion chamber having an outlet for delivering products of combustion to the said flues and the said fiues being arS ranged to distribute such products substantially uniformly to the heating chamber.

4. A furnace or oven comprising in combination walls enclosing a heating chamber, the bottom wall constituting a floor for said chamber and being provided with a flue therebeneath and extending substantially the length thereof, a combustion chamber within the heating chamber and arranged to heat such chamber by radiation and having an outlet for products of combustion discharging into said due, and means for supplying a combustible mixture to the combustion chamber, the said flue having means for distributing the products of combustion therefrom into the heating chamber.

5. A furnace or oven' comprising in combination Walls enclosing a heating chamber, the bottom wall constituting a floor for said chamber and being provided with a flue therebeneath, a combustion chamber arranged within the heating chamber and arranged to heat such chamber by radiation and having an outlet for products of combustion discharging into said flue, and

Vmeans for supplying a combustible mixture to the combustion chamber, the said fiue extending substantially the full length of the first mentioned chamber and being provided With "discharge openings arranged substantially equidistantly apart whereby the products of combustion will be distributed substantially uniformly to the heating chamber.

6. A furnace or oven comprising in combination walls enclosing a heating chamber, the bottom wall forming a floor for said lchamber and being provided beneath said floor with laterally spaced flues extending from the front portion thereof toward the rear portion thereof and with a transversev flue adjacent the front thereof communicating with the first mentioned flues, a combustion chamber supported within the heating chamber between the first mentioned and bottom'thereof and extending from the .front toward but spaced from the rear thereof and forming upper and lower communicating passa es within such combusto the front o tion chamber, the ront of the lower passage communicating with the transverse flue, and means for supplying a combustible mixture the upper passage, the said combustion chamber being composed of material having high heat radiating qualities, and the first mentioned flues belng provided each with one or more openings for delivering products .of combustion supplied thereto into the first mentioned chamber.

7. A furnace or oven comprising in combination walls enclosin a heating chamber, the bottom wall forming a floor for said chamber and being provided beneath said floor `with laterall spaced flues extending from the front po ion thereof toward the rear portion thereof and with a transverse flue adjacent the front thereof communicating with the first mentioned fines, a combustion chamber supported within the first mentioned chamber between the first mentioned flues and extending longitudinally of such heating chamber, the said combustion chamber having a partition intermediate the top and bottom thereof and extending from the front toward but spaced from the rear thereof and forming' up r and lower communicating passages within such combustion chamber, the front of the lower pa'ssage communicating with the transverse flue, and means for supplying a combustible mixture to the front o the upper passage, the said combustion chamber being composed of material having high heat radiating qualities and the first mentioned ilues belng provided with openings for delivering products of combustion supplied thereto into the first mentioned chamber, the said openings being arranged to distribute the roducts ofI combustion substantiallyl uniormlythrough`out the length of their respective flues into the chamber thereabove. 8. Afurnace or oven comprising in combination walls enclosing a heating chamber, the bottom wall forming a floor for said chamber and being provided beneath said floor with laterally spaced' lues extending from the front/portion thereof toward the rear portion thereof and with a transverse flue communicating with the first mentioned dues, a combustion chamber sup orted within the heating chamber an extendin longitudinall of such chamber, the said combustion c amber having an outlet communicating with the transverse fiue, and means for supplying a combustible mixture to the combustion chamber, the said combustion vchamber being composed of material having high-heat radiating qualities, and the first mentioned ilues being provided each with one or more openings for delivering products of combustion supplied thereto into the first mentioned'ehamber.

9. A furnace or oven comprising in oombination walls enclosing a heating chamber, the bottom wall forming a floor for said chamber and being provided beneath said floor with laterally spaced [lues extending fromthe front portion thereof toward the rear portion thereof and with avtransverse ue communicating Lwith the first` mentioned fines, a combustion chambersupported within the first mentioned chamber between the first mentioned flues and extending1 longitudinally of such first mentioned c amber, the said combustion chamber having an outlet communicating with the transverse Hue,

and means for supplying a'eombustible mixture to the com ustion chamber, the said combustion chamber being composed of material having high heat-radiating qualiyties and the first mentioned flues being provided with openings for delivering products of combustion supplied thereto 1nto the first-mentioned chamber, the said openings being arranged to distribute the products o!" I combustion substantially uniformly t Q iuesuignto the chamber thereabove.

In testimony whereof, I -hereunto aiiix my signature. Y

HIRAM B. CANNON'.

hout the length of their respective 

